Drilling machine having interchangeable hand and power feeds



Feb. 11, 1930- D. c. KLAUSMEYER 2 DRILLING MACHINE HAVING INTERCHANGEABLE HAND AND POWER FEEDS Original Filed Feb. 10. 1925 4 Sheets-Sheet l mmuii Feb. 11, 1930.

D. C. KLAUSMEYER DRILLING MACHINE HAVING INTERCHANGEABLE HAND AND POWER FEEDS Original' Filed Feb. 10. 1925 4 Sheets-Sheet 2 III In IIII WIT Feb. 11, 1930. D. c. KLAUSMEYER DRILLING MACHINE HAVING INTERGHANGEABLE HAND AND POWER FEEDS Original Filed Feb. 10, 1925 4 Sheets-Sheet 3 11 ,,,,,,,,,,,,,,mmnnumn Feb. 11, 1930. D. c. KLAUSMEYER DRILLING MACHINE HAVING INTERCHANGEABLE HAND AND POWER FEEDS 1925 4Sheets-Sheet 4 Original Filed Feb. 10

avwemto'z Slime 1 Likewise in tapping,

Patented Feb. 11, 1930 UNITED STATES PATENT OFFICE DAVID c. xnausmnxnn, or CINCINNATI, 01110, nssrenon To run CINCINNATI BIGZK- ronn TOOL COMPANY, or CINCINNATI, 0310, A CORPORATION or 01110 DRILLING MACHINE H AVING INTEBCHANGEABLE BAND AND POWER FEEDS Original application filed February 10, 1925, Serial No. 8,185. Divided and this application filed June 12,"

1926. Serial No. 115,426.

Drilling'and tapping machines, as comof these machine-tools, and, to the end that perfect work may be produced and the tool e not damaged, it is necessary that provision be made whereby these machine-tools may beadapted to meet these varying condi- 5 tions. For example, when drilling with a .large drill in hard material it is necessary that the drill be rotated and fed into the work slowly, whereas a drillofsmallerdiameter maybe given faster rotation and feed. the size of the tap and the nature of the work combine to determine the speed at which the tap may be rotated and fed axially with satisfactory andefficient results. Also in tapping it is essential that the speed of rotationv and the feed of the tap be coordinated so that at each rotation of the tap its axial feed will be equal in amount to the lead of the thread on the tap, otherwise either the threads will be stripped or the tap will be broken.

For certain operations, and in certain materials, it is necessarythat the feed be power actuated and that it be co-ordina'ted with the speed of rotation of the spindle. Other operations require that the direction of rotation be reversible.

Still other operations require that the spindle bereversible but that no power feed be provided e.-g. where the tap is merely started into the work by a hand 40 ,feed and then is permitted to feed itself into the work by its rotation and the lead of its thread. For certain other drilling operations both the power feed and the reversing mechanism may Well .be dispensed with, the feed of the spindle being efiected manually, and

were the machine tools to perform only these latter operations they could be much less complicated in construction and correspondingly less costly to build and operate,

To meet these varying conditions in a single machine tool requires the provision of speed change devices, reversing mechanisms,

complicated adjustments, etc. and although certain machine tools have been provided which are sufiiciently universal to perform all of these various operations in various ma terials they are necessarily complicated and expensive to build, purchase,- and operate. Therefore, to eliminate this excessive expense,

it has been found desirable, wherever a great.

number .of duplicate parts are produced to provideseparate machine tools each equipped to perform only. a single operation. Machines so constructed are far less expensive than the so-called universal machines.

While single-purpose machine tools are generally conceded to be most efficient for quantity production there are, however, certain times and conditions that make it desirable to have these machines adaptable to changes or alterations which fit them for new and different operations. therefore has for an object to render availablea drilling and tapping machine which selectively may be equipped to perform any specific operation, for which machines of this nature are adapted, and when so equipped will be devoid of all superfluous and unused mechanism. In other words this invention seeks to provide a single machine tool which may be equipped in various ways to adapt it to perform operations for which previously it was not ada ted and which, in each of its uses, will have a l of the advantages of a single purpose machine. This interchangeability of the machine not only permits auser,

This invention at a nominal cost, to reconstruct a singleplete, in large quantities, a single type of machine tool which later may be completed either as a universal machine or as any specific single purpose tool in accordance with the demands of the trade.

Stated more specifically this invention has for an object to provide a drilling machine which may be equipped in any one of four different ways as follows 1stlVith a tool spindle having uni-directional rotation and manual feed.

2ndlVith a tool spindle having uni-direction rotation and power feed.

f 3(i1'dlVith reversible spindle and manual 4th ith reversible spindle and power feed.

The objects of this invention have been attained by so constructing the machine standard that it is adapted to receive, at its upper end, any one of a plurality of brackets or heads each equipped with a different spindle rotating mechanism. Thus, where the machine is to be used for drilling only a head having a uni-directional drive may be secured to the standard. Should it be desired to use the machine for tapping the standard may be equipped with a head having a reversible spindle drive.

The standard also is adapted to have permanently secured to it, intermediate its ends, and in any one of a plurality of positions, a spindle feed-head adapted selectively to be equipped with either hand or power actuated means for translating the spindle.

Power to actuate the spindle feed is preferably taken from the spindle rotating mechanism carried in the removable spindlebracket whereby the rotation and translation of the spindle are coordinated. The feed bracket is so constructed that the power feed drive may be attached thereto and removed therefrom at will. Means also is adapted to be secured to the feed bracket to throw out the power feed when the tool spindle has received a feed of predetermined extent.

This application is a division of my application Serial No. 8,185, filed Feb. 10, 1925 entitled Direct drive drill.

Other objects and advantages will be in part indicated in the following description and in part rendered apparent therefrom in connection with the annexed drawings.

To enable others skilled in the art so fully to apprehend the underlying features hereof that they may embody the same in the various ways contemplated by this invention, drawings depicting a preferred typical construction have been annexed as a part of this disclosure and, in such drawings, like characters of reference denote corresponding parts throughout all the views, of which Figure 1 is a perspective view of the upper portion of an interchangeable head convertible drilling and tapping machine equipped with a tapping-head and hand feed. Fig. 2 is i an enlarged side elevation, partly in section, of the upper portion of the same machine showing it equipped with power feed. Fig. 3 is a vertical section of the upper portion of the standard and the tapping-head removably secured thereto showing the reversible driving connection from the prime mover to the spindle. Fig. 4 is a View similar to Fig. 3 but showing a drilling head removably secured to the standard. Fig. 5 is a section on the line 55 of Fig. 2, showing, in full lines, the feed-head equipped for hand feed and, in dotted lines, the power drive adapted to be secured thereto when desired. Fig. 6 is a detail plan of the spindle-feed drive gears carried by the spindle-supporting bracket and actuated from the spindle drive sleeve. Fig. 7 is a detail side elevation, partly in section of the means for selectively rendering effective any pair of a plurality of feed gears later to be referred to. Fig. 8 is a horizontal section on the line 88 of Fig. 7. Fig. 9 is detail view of a modified feed actuating gear train adapted to be embodied in either of the interchangeable heads for rotating the power feed shaft from the spindle rotating sleeve. Fig. 10 is a front view of the power feed throwout.

Referring more specifically to the drawings, the invention is disclosed in its preferred form as embodied in a machine-tool comprising an upright standard 1 adapted to support, at its upper end, any one of a plurality of interchangeable brackets each fitted with a different type of spindle rotating mechanism. This standard also supports, at its upper end, a prime-mover preferably, but not necessarily, in the form of an electricmotor M which provides power to rotate and translate the spindle journaled in each of the several brackets. This motor may be either of the single or variable speed type as may be demanded by the trade. Intermediate its ends the standard also has secured to it a spindle feed bracket 13 and a suitable work-table, not shown. For a more complete illustration of this machine tool reference may be had to my pending application Serial No. 8,185, above referred to, of which this application is a division.

As hereinbefore explained this invention proposes a machine-tool which readily may be converted from a drilling machine, in which the tool spindle may be rotated only in a single direction, to a tapping machine in which the spindle may be rotated first in one direction to screw the tap into the work and then reversed to unscrew it therefrom and also to be fed axially to force the tap into the work substantially in accordance with the .lead of the thread on the tap. To this end the upper end of the standard is provided with a finished face f against which may be secured, as by screws 2, either a drilling bracket D, as shown in Fig. 4 or a tapping bracket T as shown in Figs. 1, 2 and 3. It is to be understood that each of the brackets is formed with a finished face and screw holes which are complemental to the finished face and screw holes provided by the standard.

Within the drilling bracket D is arranged a single speed uni-directional drive for the tool spindle S which is splined in a sleeve 9 rotatably journaled in a bearing 3 provided by said bracket. This drivepreferably comprises a first-driven gear 4 secured upon 'a stub shaft 5 journaled in bearings 6 also provided by the bracket. A bevel pinion 7 fixed to the shaft 5 drives a gear 8 secured to the sleeve 9 and serves to transmit rotary motion to said sleeve and spindle. A gear 10 rotatable with the gear 8 may serve to actuate spindle feeding mechanism later to be described. The gear 4 meshes with, and is driven by a driving pinion 11 removably secured upon the armature shaft 12 of the motor M as by a key 13 and set-screw 14.

This removability of the driving pinion 11 permits gears of various sizes to be secured upon the motor shaft, whereby the ratio between the driving gear and the initial driven gear 4 may be changed to vary the speed of rotation of the spindle S. To effect the proper meshing of driving and driven gears of various ratios the motor is preferably so supported upon the standard as to be adjustable toward and from the axis of the shaft 5. 'This may be eflected b securing the motor upon a bracket 15 a justably mounted for vertical movement upon the upper portion of the standard 1 and adapted to be secured in its adjusted position by screws 16 passing through apertures in the bracket and threaded into the standard. A screw 17 threaded into the lower part of the bracket 15 and having its head resting-upon a shoulder 18 provided by the standard, serves to adjust the bracket vertically on the standard.

A jam-nut 19 threaded upon the screw 17 assists in maintaining the bracket in its adjusted positions.- The bracket 15 also carries a controller box 15 adapted to house any suitable type of motor controller.

It will readily be perceived that inasmuch as the spindle driving train is completely assembled in the bracket D and the gears 4 and 11 readily may be separated, removal of the screws 2 will permit the bracket and the mechanism carried thereby to be removed from the standard as a unit, whereupon another bracket, equipped with a reversible drive, may be attached in its place. The spindle S has a splined connection with the spindle rotating sleeve 9 and therefore if desired the bracket and sleevemaybe stripped from the spindleleaving the spindle supported by the feed bracket B. The next bracket to be attached to the standard may then be passeddown over the spindle thereby inserting the spindle into the spindle driving sleeve after which it may be secured to the standard by the screws 2.

The tapping bracket shown in Figs.- 1, 2 and 3 also embodies a driven shaft 5 journaled in bearings 6 and which carries, at one end, a driven gear 4 adapted to be meshed with a gear on the motor shaft and, at the other end, a bevel pinion 7 At opposite sides of its center the pinion 7 meshes with and continuously drives, in opposite directions, bevel-gears 20 and 21 freely rotatable on a long sleeve 22 journaled in bearings 23 and 24 provided by the tapping bracket T. Like the sleeve 9, the sleeve 22 has a splined connection with the tool spindle and rotation of the sleeve likewise cause rotation of the spindle. Either of the oppositely rotating gears 20 or 21 selectively may be caused to rotate the sleeve 22. This selective drive is effected by friction clutches 25 and 26 carried by the sleeve 22 and cooperating with the gears 20 and 21 respectively. These clutches are selectively rendered effective to drive the spindle by endwise movement of a bar 27 having clutch-actuating cam-surfaces 28 and 29. A collar 30, slidably mounted upon the sleeve 22 is attached to the bar 27 and therefore translation of the collar shifts the bar and actuates the clutches 25 and 26. Manual means is provided for shifting the collar 30. This comprises a lever 31 fixed upon a shaft 32 journaled horizontally in the bracket T. The shaft has secured to'it, inside the casing, an arm 33 which carries a shoe or stud 34 fitted within an annular groove 35 in the collar 30. Thus by suitable manipulation of the lever 31 the drill spindle may be caused to rotate either forwardly or backwardly as desired. The spindle rota-ting sleeve 22 also carries a spindle feed drive gear 36 later to be referred to. The specific construction of this reversing mechanism forms the subject of my pending application Serial No. 805 filed January 6, 1925.

-The standard 1 is formed, intermediate its.

ends with a finished face 49 similar to the face 7. Upon theface 49 is adapted to be non-adjustably secured, in any one of three predetermined positions, a spindle feed-head B within which is translatably mounted a spindle feed-sleeve 52. The spindle S is rotatably journaled in the sleeve 52. Thrust bearings 53 and 54 carried bythe spindle at opposite ends of the sleeve 52 preventrelative endwise movement between the sleeve and ,(see particularly Figs. 1 and 2). Within the head B isjournaled a shaft 57 which carries a pinion 58 meshing with a rack 59 affixed to the sleeve 52. A pilot lever 60, attached to the shaft 57, affords means whereby the sleeve 52 and the spindle S carried thereby may be translated manually. lVhen so desired, power means may be provided to translate the tool spindle. To provide for the attachment of this power feed the head B is preferably formed with the necessary finished surfaces .9 and bolt holes 6 (see Figs. 1 and to which may be secured a power feed bracket 61 carrying a horizontal shaft 62 upon which is secured a worm 63 and a bevel-gear The worm is'adapted to drive a worm wheel 63 which (when a power feed is desired) is secured to the shaft 57.

To permit the feed of the spindle to be dis- 'continued when the spindle has reached a predetermined low position, the bracket 61 which carries the worm 63 is pivotally attached to the feed head B by a pivot screw P so that the bracket may swing downwardly about its pivot to disconnect the worm and worm wheels as shown in dotted lines in Fig. 2. A cap screw 200 passes through a slot 201 in the bracket 61 and is threaded into the head B and serves to maintain the bracket against the forward finished surface s of the feed head yet permitting it to swing about its pivot P. A lever 100, fulcrumed on the head B by means of a screw 101 threaded into the hole 102 is pivotally attached to the bracket 61 at 103 and serves to restore the bracket to its operative position after the worm and worm wheel have been disconnected. Cooperating with the lever 100, to maintain the power feed operative, is a latch-lever 104 fulcrumed, upon a screw 105 threaded intoan aperture 106 formed in the finished face t of the feed-head B. This latch-lever is normally pressed upwardly by a spring plunger 107 which causes the hooked end 101 of the lever to overlie the lever 100 to hold it depressed thereby maintaining the bracket 61 in its upward position with the worm and worm wheel in mesh. A trip dog 108, adjustably secured to the spindle sleeve 52, has a depending portion 109 adapted to engage and depress the latch lever 104 thereby releasing lever 100 and permitting it to be swung about its fulcrum by the weight of the bracket 61 and the parts carried thereby. This downward movement of the bracket 61 disconnects the worm and wormwheel thereby stopping the feed of the spindle.

The bevel-gear 64tis driven by a similar gear 65 carried by one portion of a vertically disposed telescopic feed-shaft 66 journaled at its lower end in a bearing 66 removably secured to the feed-head B. This shaft comprises sections 66 and 66 splined together as at 67 thereby permitting the head B to be adjusted vertically without disturbing the driving connection between the sections 66 and 66". This connection also permits the spindle feed actuating mechanism, carried by the interchangeable brackets D and T to be disconnected from and reconnected with the feed mechanism carried by the feed-head B. Power to rotate the shaft 66 is taken from the gears 10 or 36, hereinbefore referred to, and transmitted through gears 68 and 69 loosely journaled on a shaft 68 and a gear 70 journaled on a shaft 70 to a cone of gears 71. This cone comprises gears 71, 71 71, 71, and 71 maintained permanently in mesh with gears 72, 72, 72, 72 and 72 respectively. The last named gears are loosely journalcd upon the shaft section 66 and are adapted selectively to be secured thereto by means of a drive key 73 pivoted upon a rack-bar 76 slidable lengthwise in the section 66. The key has a head 74: projecting through a slot 75 in the section 66 and entering slots formed in the inner periphery of the gears. The rack-bar 76 is preferably cylindrical, having the rack teeth running entirely around it, thereby permitting the rack-bar to rotate while in engagement with a pinion 77 held in a horizontal bore 78 in the spindle bracket. The pinion 77 is preferably of considerable length and has meshing with it an actuating rack-bar 79 slidably mounted in a vertical bore 80, also in the spindle bracket. A bell-crank lever 81, fulcrumed at 82 to the outside of the bracket has one arm pivotally attached to the rack-bar 7 9 and affords means to shift the key 78 to efiect any desired spindle feed. A spring detent 83 engaging the rack-bar 79 holds the parts in their adjusted positions.

The spindle S is counterbalanced by a weight 84 (Fig. 5) attached to one end of a chain or other flexible connector 85 which passes over rollers 86 and 87 supported by the spindle bracket and the standard respectively, and has its other end attached to the spindle feeding sleeve 52.

F or certain purposes the speed-change gearing between the spindle and the feed shaft 66 may not be required. To meet this condition the single speed feed-drive illustrated in Fig. 9 may be employed. This drive comprises the drive gear 36 (or 10) on the spindle. sleeve, a gear 110 on the feed shaft 66 (which in this arrangement may be a single one-piece shaft) and two intermediate gear units 111 and 112'loosely journaled on studs 113 and 114 secured in the bearings for the shafts 68 and 71 before mentioned. The gear unit 111 comprises a large gear 111, in mesh with the gear 36 on the spindle sleeve, and a smaller gear 111 adapted to drive the large gear 112 of the gear unit 112. small gear 112 which drives the gear 110 on the feed shaft. Thus it will be seen that either of the brackets D or T may be equipped either with the multiple speed feed mecha- This latter gear unit also includes a,

nism shown in Fig. 2 or the single speed drive shown in Fig. 9;

From the foregoing it will be perceived that this invention has provided a machine tool which is adapted to be equipped by the manufacturer in any one of a plurality of ways to meet the varying demands of the trade and also which the user, at a nominal expense, may change in accordance with the changes in his manufacture, and which in every one of its adaptations has all of the advantages of a single purpose tool. For example, a user may purchase a machine in its simplest form for plain drilling i. 'e. equipped with non-reversible spindle and hand-feed.

Later should he wish to have a power feed installed, to meet certain changes in his manufacture the necessary parts readily may be obtained and attached. Still later he may require a tapping machine and again the necessary parts may be obtained and secured in their proper positions.

Another important feature of this invention is the provision for permanently securing the feed head B to the standard in any one of three predetermined positions. Certain prior machines have provided means for adjusting a feed-head on the standard but so far as applicant is aware all of these prior devices have included undercut or angular guides and guideways on the standard and feed-head, (which must be very accurately finished) and clamping means to secure the feed-head to the standard. Applicant secures all of the advantages of these prior-constructions in a more simple and positive-way which requires the finishing of only two fiat surfaces, one on the standard and the other on the feed-head. In place of the complicated and impositive clamps of prior devices applicant merely provides four bolts and three sets of bolt holes by means of which the feed-head may be positively secured to the standard in any one of'three positions.

Without further analysis, the foregoing will so fully reveal the gist of this invention, that others can, by applying current knowledge, readily adapt it for various utilizations by retaining one or more of the features that, from the standpoint of the prior art, fairly constitute essential characteristics of either the generic or specific aspectsof this invention and, therefore, such adaptations should be, and are intended to be, comprehended within the meaning and range of equivalency of the following claims.

Having thus revealed this invention, I claim as new and desire to secure the following combinations and elements, or equivalents therefor, by Letters Patent of the United States 1. A drilling machine combining a standard provided with a plane surface and a plurality of sets of threaded bolt holes; a feedhead provided with a set of bolt holes compleby bolts passed through the holes in said feed-head and threaded into any selected one of said sets of bolt holes in said standard; a spindle rotatably and translatably journaled in said feed-head; means at the upper end of said standard to rotate said spindle; and means carried by said feed-head to feed said spindle axially.

2. A drilling machine combining a standard provided intermediate its ends with a vertical disposed finished plane surface; a feedhead having a complemental finished surface adapted to contact with said first named surface; means non-adjustably to secure said feed-head to said standard in any one of a plurality of predetermined vertical positions,

I said means including a plurality of sets of apertures formed in the finished surface of said standard, a plurality of attaching members engaging said feed-head and adapted to be engaged with any selected one of said sets of apertures; a spindle rotatably and trans latably supported by said feed-head; and

means carried by said feed-head to feed said spindle axially.

3. A drilling machine combining a standard; a spindle feed-head secured to said standard; a spindle sleeve translatably mounted in said feed-head; a spindle rotatably but non-translatably journaled in said sleeve; a rack-bar carried by said sleeve; a shaft rotatably journaled in said feed-head; a pinion secured to said shaft and meshing with said rack; manually actuated means to rotate said shaft; a worm-wheel on said shaft; a feed-bracket removably secured on said feed-head; a shaft journaled in said feedbracket; a bearingbracket removably secured to said feed-head; a feed drive shaft journaled in said bearing; a bevel-gear connection between said feed shaft and the shaft journaled in said feed bracket; a worm on said last named shaft adapted to drive said worm-wheel to effect power feed of said spindle; and means permitting bodily removal of said bearing-bracket, feed bracket, shafts, bevel gears and worm to. eliminate the power drive for said feed without disturbing the manual drive.

4:. An upright drill combining a standard; a bracket mounted upon said standard; a spindle rotatably journaled in said bracket; a prime-mover; means carried by said bracket and actuated by said prime-mover to rotate said spindle; an upright feed shaft; spindle feed gearing carried by said bracket and operatively connected with the spindle rotating means and said feed shaft, said spindle feed gearing including a cone of gears loosely journaled on said feed-shaft; a drive key slidable axially of said cone of gears and adapted to in its various positions to secure certain of the gears of said cone to said shaft; means to shift said drive key, said last named means comprising a cylindrical rack bar to which said key is pivoted, a pinion rotatably journaled in said bracket and in mesh with said rack-bar; a second rack bar in mesh with said pinion; and a manually actuable lever fulcrumed to said bracket and having an operative connection with said second rackbar.

In Witness whereof, I have hereunto subscribed my name.

DAVID C. KLAUSMEYER. 

